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Standards GB are Chinese national standards, which are issued by China's Standardization Administration Office (SAC).
Chinese national standards are used all over China commonly labeled as GB standards. They determine the united production requirements regarding product safety and quality .
GB standards are often modified or created according to the international standards of ISO, IEC or any other international level.
Although, they are largely harmonized, GB standards may differ from international standards .
Approximately 15% of all GB standards are obligatory and they can be identified according to the prefix GB, after which the code of the standards follows:
GB – Obligatory national standards
GB/T – Optional national standards
GB/Z – National steering technical document
Methods for chemical analysis of chromium metal—The infrared absorption method for the determination of sulfur content
WITHDRAWN published on 21.2.1988
Selected format:Methods for chemical analysis of chromium metal—The combustion-neutralization titration method for the determination of sulfur content
WITHDRAWN published on 21.2.1988
Selected format:Methods for chemical analysis of chromium metal--The perchloric acid dehydration-gravimetric method for the determination of silicon content
WITHDRAWN published on 4.10.1984
Selected format:Methods for chemical analysis of chromium metal. The molybdenum blue photometric method for the determination of phosphorus content
WITHDRAWN published on 4.10.1984
Selected format:Methods for chemical analysis of chromium metal--The EDTA volumetric method for the determination of iron content
WITHDRAWN published on 4.10.1984
Selected format:Methods for chemical analysis of chromium metal--The atomic absorption spectrophotometric method for the determination of aluminium content
WITHDRAWN published on 4.10.1984
Selected format:Methods for chemical analysis of chromium metal--The EDTA volumetric method for the determination of aluminium content
WITHDRAWN published on 4.10.1984
Selected format:Methods for chemical analysis of chromium metal--The atomic absorption spectrophotometric method for the determination of iron content
WITHDRAWN published on 4.10.1984
Selected format:Capacitor voltage transformers
WITHDRAWN published on 1.1.1984
Selected format:Capacitor voltage transformers
WITHDRAWN published on 2.11.2001
Selected format:Latest update: 2025-09-15 (Number of items: 2 233 685)
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